Thumbnail Image

Update 2009 on climate and oceanographic conditions in the Indian Ocean

Year of publication 2013

Place of publication Rome, Italy ;

Product type Meeting

Category Meeting document

Edition 1

Statutory body / Meeting title Indian Ocean Tuna Commission (IOTC)

Meeting symbol IOTC-2009-WPTT-14

Language English

Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Meeting
    Meeting document
  • Thumbnail Image
    Meeting
    Meeting document
    Outline of climate and oceanographic conditions in the Indian Ocean in the recent years: an update to August 2013 2013
    Also available in:
    No results found.
    In this paper, we provide an update on the trends of climate and oceanographic conditions in the Indian Ocean and in sub-regions (Somali basin, East and West Equatorial areas, Mozambique Channel and Maldives). The ENSO cycle has been largely fluctuating between ENSO-neutral and Niña conditions during the past 4 years. Positive sea surface temperature (SST) anomalies have prevailed since the early 2000 over the West Indian Ocean (WIO). Substantial deepening of the thermocline occurs in the WIO in relation with intense El Niño events, but the opposite response (shoaling) during La Niña events is not clear on the long term. Since 2008, SOI has shown predomintly positive values (Niña) and thermocline has shoaled without major disruption along this trend until April 2011. Chlorophyll (SSC) has shown a declining trend over 2006-2010, followed by a slight increase from October 2010 to May 2011 in association with a Niña event, then continued to decline until March 2013. Then, the trend revers ed and positive anomalies developed from May 2013 onwards. Highly positive SSC anomalies were found in July-September 2013 in the Somali basin (40% above normal), suggesting an intensification of the Somali upwelling. In other areas, SSC was about the average in 2013 (Mozambique Channel, Maldives) or still slightly negative (10 % below normal) in the West equatorial (December 2012 to February 2013) and East equatorial areas. The overall chlorophyll- depleted conditions for 2006-2012 (except 2011 ) in the WIO, when the thermocline was shoaling, is unclear as we might have expected a positive chlorophyll response to an increased supply of nutrients in the photic layer associated with shallow thermocline. The skipjack purse seine CPUEs on associated sets, in the Somali basin during July-September, are distributed in chlorophyll-enriched areas resulting from the upwelling. In 2010-2012, the position of the 0.4 mg.m-3 isoline of chlorophyll concentration delineated the eastward boundary of t he skipjack CPUEs.
  • Thumbnail Image
    Meeting
    Meeting document
Show more

Users also downloaded

Showing related downloaded files

  • Thumbnail Image
    Document
    Other document
    International Year of Forests 2011 – Celebrate forests every day 2011
    Also available in:
    2011 is a special year for forests and for all who care about them. To inaugurate it, FAO has created a special issue of Unasylva. More than 100 international days are celebrated throughout the year, in recognition of a vast range of issues, occupations, activities and cultural values important to humanity. What better way to demonstrate the myriad functions of forests than to show that forests have a link to almost all of them? The Unasylva Editor, Andrea Perlis, has compiled a collec tion of images that illustrate these links. With only photos and the briefest of stories, the issue expresses the theme of the international year – “Forests for people” – by showing how forests are important to nearly all kinds of human activity. So when you celebrate Peace Day in 2011 – or International Women’s Day, or Human Rights Day, or World Health Day– even International Civil Aviation Day – you can celebrate forests.
  • Thumbnail Image
    Meeting
    Meeting document
    Report and Appendices of the 40th General Session of The European Commission for the Control of Foot-and-Mouth Disease (EuFMD)
    Rome, 22-24 April 2013
    2013
    Also available in:
    No results found.
    The 40th General Session of the EuFMD Commission took place in Rome, Italy, on the 22 to 24th of April 2013, and was attended by representatives of 31 member countries. Representatives from ten observer countries, from the invited observer institutions with special Constitutional status (EC, OIE, FAO), and from the European Medicines Agency (EMA) and civil society (industry) were registered and in attendance. There were in total around 100 persons.
  • Thumbnail Image
    Book (series)
    Guideline
    Développement de l’aquaculture. 4. Une approche écosystémique de l’aquaculture. 2011
    Also available in:
    Les dimensions sociales et biophysiques des écosystèmes sont inextricablement liées de telle manière qu’un changement dans une seule dimension est très susceptible de générer un changement dans une autre. Bien que le changement est une conséquence naturelle des interactions complexes, il doit être surveillé et même géré si le taux et la direction du changement risquent de compromettre la résilience du système. “Une approche écosystémique de l’aquaculture (AEA) est une stratégie pou r l’intégration de l’activité dans l’écosystème élargi de telle sorte qu’elle favorise le développement durable, l’équité et la résilience de l’interconnexion des systèmes socio-écologiques.” Etant une stratégie, l’approche écosystémique de l’aquaculture (AEA) n’est pas ce qu’on a fait, mais plutôt comment on l’a fait. La participation des parties intéressées est à la base de la stratégie. L’AEA exige un cadre politique approprié dans lequel la stratégie se développe en plusieurs é tapes: (i) la portée et la définition des limites des écosystèmes et l’identification de la partie intéressée; (ii) l’identification des problèmes principaux; (iii) la hiérarchisation des problèmes; (iv) la définition des objectifs opérationnels; (v) l’élaboration d’un plan de mise en oeuvre; (vi) le processus de mise en oeuvre correspondant qui comprend le renforcement, le suivi et l’évaluation, et (vii) un critique des politiques à long terme. Toutes ces étapes sont informées par les meilleures connaissances disponibles. La mise en oeuvre de l’AEA exigera le renforcement des institutions et des systèmes de gestion associés de sorte qu’une approche intégrée du développement de l’aquaculture peut être mise en oeuvre et compte entièrement des besoins et des impacts d’autres secteurs. La clé sera de développer des institutions capables d’intégration, notamment en fonction des objectifs et des normes convenus. L’adoption généralisée d’une AEA exigera un couplag e plus étroit de la science, la politique et la gestion. Elle exige aussi que les gouvernements incluent l’AEA dans leurs politiques de développement de l’aquaculture, stratégies et plans de développement.
Show more